Heat pumps in the winter take heat from the outside air even when its below freezing and puts it in the car, its a bit like your fridge it gets hot at the back from taking the heat from inside keeping your food cold, if you dont have a heat pump you have to have a resistive heater to keep the car warm this uses twice the amount of power to do the same as the heat pump can do and remember you cant get it fitted if you change your mind and to be honest there is not many EVs of this class that has not got one as standard.
Yes, I am familiar with the operation of heat pumps I have them in a property in spain.
My understanding in relation to EV's is that the heat pumps are not air source but absorb heat from the coolant that is used for the motors and batteries then utilising this residual heat to heat-up the cabin.
This was my previous query, I am not aware of any other tangible benefit that justifies the additional cost (in this case £900).
My heat pump, according to wltp figures, offers no benefit in terms of additional range afaik.
Imo, if having the cabin heated a couple of minutes sooner in winter is the only benefit, then I don't consider a £900 premium to be financially justifiable.
I would be interested to learn from anyone of any other documented tangible benefits that a heat pump provides.